Leaf-type digital clock
AssigneeRhythm Watch Co., Ltd.
InventorsKazuo Miyamoto, Hideo Koide, Isao Suzuki
Life of this patent
Estimating the term…
Abstract
A leaf-type clock driven by a intermittent and segmental rotation by using so called Geneva-gear mechanism to cause turning-over of the time- and minute-indicating leaves is disclosed. This leaf-type clock has the advantages that number of the leaves may be reduced, and that the time accuracy is improved, and further that small-sized clock can be designed.
Claims4
In a leaf-type digital clock in which hour indicating, 10-minute indicating and 1-minute indicating leaves are hinged on the horizontally oriented frames and shown in the front windows of the clock, providing that m, n and p are all positive integers, a combination of the following A-14 J:
- A. the 2nd wheel (time) (1) connected with a synchronous motor and having the Geneva-gear part (1a),
- B. a 1-minute wheel (2) mounted loosely on the shaft (5) and having the Geneva-gear part 2a which engages intermittently with said Geneva-gear part (1a),
- C. a 1-minute median wheel (6) secured to the shaft (5) and having the Geneva-gear part (6a),
- D. a 10-minute median wheel (7) consisting of the Geneva-gear part (7a) which engages intermittently with said Geneva-gear part (6a) and the gear part (7d),
- E. a 10-minute wheel (8) secured to the shaft (9) in which the shaft (5) is telescoped, and consisting of the Geneva-gear part (8a ) and the gear part (8d) which meshes with said gear part (7d),
- F. a hour median wheel (12) consisting of the Geneva-gear part (12a) which engages intermittently with said Geneva-gear part (8a), and the gear part (12d),
- G. an hour wheel (13) mounted loosely on the shaft (9) and having the gear part (13d) which meshes with said gear part (12d),
- H. 1-minute unit frames (3, 3) of one body secured to said shaft (5) but connected with said one-minute wheel 2 through ratchet mechanism, and carrying (10m) sheets of one-minute indicating leaves (4, 4), . . . on their peripheries, said ratchet mechanism being so composed as the points of jumper springs (2e, 2e), . . . which are anchored on the wheel (2) are engaged with corresponding teeth of the ratchet gear (3f) which is anchored on the frame (3),
- I. 10-minute unit frames (10, 10) of one body secured to said shaft (9) and carrying 6n sheets of 10-minute indicating leaves (11, 11), . . . on their peripheries,
- J. hour unit frames (14, 14) of one body secured to said hour wheel (13) and carrying 12p sheets of hour indicating leaves (15, 15) . . . on their peripheries.
Dependencies are inferred from the claim text.